Chemical Formula

1. F Ba F Chemical Formula Chemical formula: A representation of which elements are present and how many in a chemical compound BaF2 # of atoms present for the preceding element *** Don’t need to write the 1’s Compound drawn out!!

2. Counting Atoms Count Formula Draw them out ____ Mg ____ Cl ____ H ____ O ____ P ____ O ____ C ____ H ____ O ____ N ____ H ____ O • MgCl2 • H2O2 • P2O8 • C6H12O6 • NH4NO3

4. How many atoms? • CaCl2 • Fe(OH)3 • NH4NO3 • Ba3(PO4)2 ___ Ca ___ Cl ___ Fe ___ O ___ H ___ N ___ H ___ O ___ Ba ___ P ____ O

5. O O Bond O2 2O VS O O

6. O O H H O O H H H H 2 H2O 2OH VS